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25.05.2019 | Original Article | Ausgabe 8/2019

Surgical and Radiologic Anatomy 8/2019

Correlation of anterior overbite with root position and buccal bone thickness of maxillary anterior teeth: a CBCT study

Zeitschrift:
Surgical and Radiologic Anatomy > Ausgabe 8/2019
Autoren:
Rachana Shrestha, Xin Liu, Shoucheng Chen, Zhipeng Li, Zetao Chen, Edmond H. N. Pow, Zhuofan Chen, Baoxin Huang
Wichtige Hinweise
Rachana Shrestha and Xin Liu contributed equally to this work and should be considered co-first authors.
Zhuofan Chen and Baoxin Huang contributed equally to this work and should be considered co-corresponding authors.

Publisher's Note

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Abstract

Purpose

To investigate the correlation of anterior overbite with the sagittal root position (SRP) and buccal bone thickness (BBT) of the maxillary anterior teeth.

Methods

Cone-beam computed tomography (CBCT) data of southern Chinese patients who underwent CBCT examinations between November 2016 and December 2016 were collected. The anterior overbite was the predictor variable while the SRP and the BBT at 4 mm apical to the cementoenamel junction (CEJ-4) and midpoint of the root of the maxillary anterior teeth were set as the primary and secondary outcome variables, respectively. All measurements were done by two calibrated examiners. Correlations between variables were analyzed by the Spearman’s correlation coefficient. The significance level was set at P < 0.05.

Results

CBCT data of 146 patients (65 men and 81 women) with a mean age of 44.2 ± 13.4 years were analyzed, and of the 876 maxillary anterior teeth evaluated, 9.8% were presented with deep overbites. Most of roots of the anterior teeth (94.9%) were positioned against the buccal cortical plate, of which, in 63.8% of them the apex was not covered by bone along the long axis of the tooth. The mean BBT at CEJ-4 was 0.89 mm at the central incisor, 0.85 mm at the lateral incisor and 0.84 mm at the canine. The overbite was positively correlated with SRP Class I subtypes and the BBT at CEJ-4 (P < 0.05).

Conclusion

Deep overbite was more frequently accompanied by bone fenestration in the anterior maxillary areas.

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